My apologies if this has been presented before but it captured my attention due to the flag being blessed by Fr. Egidius Smulders (not Rev. S. Mulders as stated) of the 8th Louisiana Infantry. I believe this would be one of the original battle flags would it not?

Centreville, Dec. 2.—A grand field day presentation of a regimental battle flag to General Van Dorn’s Division of the Army of the Potomac, took place to-day. The Division comprises Gens. Bonham’s, Rhodes’ and Early’s Brigades. The colors were blessed by the Rev. S. Mulders, of Louisiana. Gens. Johnston and Beauregard, with a brilliant staff, were present. Col. Jordan, Adjutant to Gen. Beauregard, did the honors of the occasion in a spirited speech, amid music, cheers and other greetings, for Gens. Beauregard and Johnston. Six States were represented.

The following is the order read to the troops:
Headquarters First Corps of the Army
of the Potomac, Near Centerville,
November 28, 1861.
[General Orders, No. 75.]
A new banner is entrusted to-day as a battle flag to the safe keeping of the Army of the Potomac.
Soldiers! Your mothers, your wives and your sisters have made it. Consecrated by their hands, it must lead you to substantial victory and the complete triumph of our cause. It can never be surrendered save to your unspeakable dishonor and with consequences fraught with immeasurable evil. Under its untarnished folds beat back the invader, and find nationality and everlasting immunity from an atrocious despotism, and honor and renown for yourselves or death. By command of Gen. Beauregard.

Augusta Constitutionalist, 5 December 1861 p.1, col. 2